{"id":"F2006B03545","name":"AD/BAe 146/98 - Environmental Control System - Component Inspection","slug":"ad-bae-146-98-environmental-control-system-component-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43112,"registerId":"commonwealth-F2006B03545-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nBritish Aerospace BAe 146 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BAe 146/98 Environmental Control Syst","sectionType":"part","heading":"AD/BAe 146/98 Environmental Control System - Component Inspection","content":"# AD/BAe 146/98 Environmental Control System \\- Component Inspection\n\n  \n5/2002","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be a standard Airworthiness Directive issued under the Civil Aviation Regulations 1988 (CAR 1998). The scope remains tightly focused on the specific safety issue (Environmental Control System component inspection) for the specified aircraft type. The amendment reference '5/2002' suggests this is a revision to the original 1998 directive, but this is typical iterative safety regulation rather than scope creep."},"complexity_factors":["Single aircraft type applicability (BAe 146 series only)","Standardised AD structure with four clear sections (Applicability, Requirement, Compliance, Background)","No nested conditional logic — compliance is mandatory without complex exceptions","Limited cross-referencing (refers only to CAR 1998 subregulation 39.1(1) for authority)","Technical content refers to specific aircraft system components but does not define technical terms within the instrument itself","Short instrument — appears to be a standard format CASA AD of typical length"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of **British Aerospace BAe 146 series aeroplanes** to inspect components of the **Environmental Control System** (the system that manages cabin pressure, temperature, and air quality).\n- The directive mandates specific actions to address an identified **unsafe condition** — likely a defect or wear pattern that could compromise flight safety if left unchecked.\n\n**Who it affects:**\n- Operators of BAe 146 aircraft in Australia\n- Maintenance organisations servicing these aircraft\n- CASA delegates enforcing compliance\n\n**Why it matters:**\n- Airworthiness Directives are **legally binding**. Non-compliance can ground aircraft or result in penalties.\n- The Environmental Control System is critical for passenger and crew safety — failures can lead to cabin depressurisation or loss of climate control at altitude.\n- This particular AD (number 98, amended in 2002) reflects ongoing safety monitoring where original design assumptions needed updating based on operational experience.\n\n**Key sections explained:**\n- **Applicability:** Which aircraft are covered (BAe 146 series)\n- **Requirement:** What specific inspection or action must be performed\n- **Compliance:** When the action must be completed (deadlines)\n- **Background:** The safety reasoning behind the directive"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied text does not indicate any change in scope from an earlier version or original intent. The AD, as presented, applies to British Aerospace BAe 146 series aeroplanes and mandates that the corrective actions set out in the Requirement section be carried out under the timing and conditions set out in the Compliance section."},"complexity_factors":["Legal basis invokes CAR 1998 subregulation 39.1(1) requiring cross-reference to regulatory framework","Key substantive details (the Requirement and Compliance sections) are referenced but not included in the supplied text, requiring reliance on those external/subsequent sections","Applicability is clear (BAe 146 series) but implementation depends on technical instructions likely contained in other documents","Delegated decision-making (CASA delegate determines required corrective action) concentrates interpretive discretion"],"plain_english_summary":"This Airworthiness Directive, issued by a CASA delegate under subregulation 39.1(1) CAR 1998, makes specified safety actions legally mandatory for British Aerospace BAe 146 series aeroplanes to correct a stated unsafe condition. \n\nIt requires the corrective measures set out in the AD’s Requirement and Compliance sections, imposing maintenance time, labour and parts burdens on the aircraft operator while delivering the intended safety benefit."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bae-146-98-environmental-control-system-component-inspection","history":"/api/acts/ad-bae-146-98-environmental-control-system-component-inspection/history","analysis":"/api/acts/ad-bae-146-98-environmental-control-system-component-inspection/analysis","conflicts":"/api/acts/ad-bae-146-98-environmental-control-system-component-inspection/conflicts","importantCases":"/api/acts/ad-bae-146-98-environmental-control-system-component-inspection/important-cases","documents":"/api/acts/ad-bae-146-98-environmental-control-system-component-inspection/documents"}}